Adam, EHA stands for Electro Hydraulic Actuator. This is the critter that looks like an octopus to the left front of your throttle body. Has lines coming out for all the injectors. It basically is a fuel metering device which responds to inputs from various systems and provides the correct amount of fuel to the injectors based on the current operating profile generated by the engine (motor!!
)management system. Can be the root of all evil, but generally reliable given it's complex function.
2000 Dodge Grand Caravan SE